Granted Patent
Utility
US 5,496,787 · App. 08/187,715
Process for producing a vanadium-phosphorus oxide catalyst precursor
Inventors:
Masakatsu Hatano, Masayoshi Murayama, Kenji Shima, Masumi Ito
Patented Case
View Patent ↗
Granted: Mar 5, 1996
Filed: Jan 28, 1994
Inventors
Masakatsu Hatano
Masayoshi Murayama
Kenji Shima
Masumi Ito
Assignee (at issue)
MITSUBISHI CHEMICAL CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.